Java流操作之FileInputStream&FileOutputStream

文件内容复制

1. 创建两个txt文件，（inputstream.txt,outputstream.txt）

2. 在inputstream.txt中写入文字（outputstream.txt 中不写任何内容）

3. 进行文件内容拷贝

package com.gao.xi;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class TestAllEng {

	public static void main(String[] args) {

		/*
		 * 1.获取当前类的所在路径 
		 * 2.获取两个文件的路径 
		 * 3.声明FileInputStream和FileOutStream变量
		 * 4.实例化文件输出输入流
		 * 5.读写文件
		 * 6.关闭流
		 */
		// * 1.获取当前类的所在路径
		String path = "src/com/gao/xi/";
		// * 2.获取两个文件的路径
		String inpath = path + "inputstream.txt";
		String outpath = path + "outputstream.txt";
		// * 3.声明FileInputStream和FileOutStream变量
		FileInputStream fin = null;
		FileOutputStream fout = null;
		try {
			// * 4.实例化文件输出输入流
			fin = new FileInputStream(inpath);
			fout = new FileOutputStream(outpath);
			// * 5.读写文件
			byte[] buff = new byte[1024];
			int len = 0;
			while ((len = fin.read(buff)) != -1) {
				fout.write(buff, 0, len);
				System.out.println(new String(buff, 0, len));
			}

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			// * 6.关闭流
			if (fin != null) {
				try {
					fin.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			if (fout != null) {
				try {
					fout.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		}

	}

}